Automatic paper-layer for printing-machines



BJEB AUTOMATIC PAPER LAYER soanmnne MACHINES. APPLICATION FILED lUlQY31.1919. 4 1,331,977, Patented Feb. 24,1920.

3 SHEETS-SHEET l.

P. BIERI.

AUTOMATIC PAPER LAYER FOR PRINTING MACHINES.

APPLlCATiON FILED JULY 31.1919

1,33 1,977. Patented Feb. 24, 1920.

3 SHEETS-SHEET 2,

BIERI, AUTOMATIC PAPER LAYER FOR PRINTING MACHINES.

APPLICATION FILED JULY 3|. l9l9.

Patented Feb. 24,1920.

3 SHEETS-SHEET 3.

titl

UNITED STATES ratrnnr OFFICE.

PAUL BIEBI, OF GENEVA, SWITZERLAND.

AUTOMATIC PAPER-LAYER FOR, PRTNTING-MACHINES.

Application filed July 31.

To all whom it may concern:

Be it known that I, PAUL BIER'I, citizen of Switzerland. residing at 26Rue des Bains, Geneva, in the Confederation of Switzerland. haveinvented certain new and useful Improvements in Automatic Paper- La-yersfor Printing-Machines, of which the following is a specification.

This invention relates to an automatic paper layer for printingmachines, for lifting off the cut sheets from a table and lifting); thesaid sheets over paper stop and placing them on a transport roller, andthe invention comprises substantially a cross-bar in tended to seize thepaper and constituted by two tubes or pipes inserted into each other andprovided with nozzles, one being a compressed air pipe and one a suctionair pipe, the said cross-barbeing supported in brackets, and movingparts driven from one and the same driving shaft and intended to impartto the cross-bar a horizontal swinging motion combined withtippingmotion, and to advance the paper table.

A construction according to the tion is illustrated by way of example inaccompanying drawing in which- Figures l.3 show three characteristicpositions of the apparatus,

Fig. 1 showing in partial side elevation and section the lifting off ofa paper sheet from the paper stop,

Fig. 2 shows in partial side elevation the carrying of the said sheetover the stop, and

Fig. 3, in partial side elevation, the placing of the said sheet on thetransport device.

Fig. 4 is a plan, partly in section, of the parts. shown in Figs. 1 3,the tubes or pipes of the cross-bar being turned so as to show theconnections.

Fig. shows in side elevation the operation of the paper stop by the samedriving shaft as effects the paper transport or con veying.

Fig. 6 is an end View of a bracket of the cross-bar on the right handside of the machine.

The general arrangement of the paper layer is the same as usualheretofore, the cut sheets 1 being placed in a properly arranged layeron a'tahle 2 which is successsively raised as the sheets are lifted oil.W hen in position on the table the front edges of the sheet lie againsta stop 3. The apparatus is intended to lift the sheets inventheSpecification of Letters Patent.

Patented Feb. 24, 1920.

1919. Serial No. 314,435.

' singly and to carry them over the edge 3 of the stop on to theconveyor device 4:.

In the following description the expressions left and right are to beunderstood to refer to the direction of movement of the paper.

5 shows the left hand frame of the apparatus. To the same is screwed ahinge part.

(i to which is hinged a guide rail 7. In dove-tailed guides 7 of thesaid rail T is adjustably mounted a bracket 8 which forms a support fora. cross-bar rotatably mounted in the same and consisting of two tubesor pipes 9 and 9 inserted into each other. The said cross-bar extendsover the whole width of the paper and is supported on the right handside by a similar bracket on a similar guide rail. The guide rails 7 atboth sides of the machine are provided at their free ends with laterallyarranged guide rollers 7 and rest with the same on the circumference ofcams 23, but in such a manner that in their lowest position they areparallel to the upper edge of the frame. with a small clearance. Theouter tube 9 of the cross-bar has for instance ten downward nozzles 9intended to suck up the paper sheets, the said nozzles being secured tothe tube, which is closed at the ends by means of caps 9 on the innertube. The latter is provided at its front side with a number of nozzles9 intended for the escape of compressed air, the said nozzles beingsecured to the tube and carried in an airtight manner through the tube 9and curved backward in such a manner that the jet of compressed airblowsunder the openings of the suction air nozzles which to this end areobliquely cut at the side facing the compressed air nozzles,-so that thesheet end sucked up by them, is raised obliquely, and the compressed airjet blows under it. The inner tube 9 projects at the right hand side ofthe machine, not shown, out of the corresponding closing cap for thetube 9 and there forms a connection. for a rubber tube supplying thecompressed air. tube 9 for the suction air in addition to being;supported in the brackets is moreover loosely rotatable in connectingrods 12 and projects with its two ends beyond the brackets 8. At theseends are secured tipping levers 10 which form at the same time lateralguides provided at their inner rollers 10, by means of ends withfriction which and owing to T he outer:

for the cross-bar and are the weight of the nozzles 9 9 they restagainst the guides surfaces of curves parts 11 screwed laterally to theuide rails 7. Owing to the shape of the said curved parts which areinterchangeable, the suction nozzles, at the beginning of the advancemovement of the brackets 8 in their guides 7 assume with their ends asomewhatoblique position directed forward, so that the end of a sheetsucked up by them, is directed upward and therefore can be carried overthe edge 3 of the stop in a reliable manner, that is to say withoutstriking against it. This position of the sheet end assists also theblowing under the sheet, and the loosening of the same, as well as theholding down of the next following sheet. This position is shown in Fig.1.

The interchangeability of the curved parts is a necessar condition inorder to enable sheets of di erent thickness of paper to be fed with oneand the same machine: for sheets of thin paper require curved partsmilled out more deeply, and therefore ends directed upward at a greaterangle than, say, cardboard-like sheets where a smaller inclination ofthe end of the sheet is suflicient, and a decided bending of the saidend by suction would not be possible.

Owing to the further shape of the curved part, the suction nozzle,immediately after passing the edge 3 will again assume a verticaldownward position owing to the rollers 10 moving upward. The end of thesheet will be thereby brought into a suitable position in order to betaken by the conveyer or transport parts.

The hinge parts 6 are used not only for hinging the guide rails 7, butalso as bearings for a spindle 13 so that its ends form hinge pins ofthe hinges. These ends. are moreover extended at both sides beyond thehinge parts and have secured to them there arms 14: connected by meansof rods 15 to crank disks 17 Within the hinge parts 6 to the spindle 13are moreover secured arms connected to the connecting rods 12 and thustransforming the rotary motion of the crank disks into a reciprocatingmotion of the brackets supportingthe'cross-bar 9 9 The left hand end ofthe said spindle, shown in Fig. 4, is bored through a certain depth and,iike the arms 16 and the connecting rod 12, formed into a pipe for thesuction air. The pipe 9 is provided at the point Where it is engaged bythe connecting rod 12, with a slot whlch remains in communicationwiththe pipe of the connecting rod even duringthe tipping movement of thelevers 10 and during the reciprocation of the brackets 8. The

connecting rod 12 is provided at the point of its connection to the arm16 with, a wooden pin 12 secured to the head of the connecting rod wh1chis in communication through an opening with the pipe of the latter andremains in communication through a slot with the pipein the arm16 alsoduring its movements.

The outer end of the spindle 13 is then connected by means of a rubbertube to a suction air pipe not shown in the drawing.

The spindle of the crank disks 17 forms the drivingshaft of the paperlayer; by means of spur wheels 18 it is in engagement with a lowerspindle l9 formin the driving spindle 17 a of the co-nveyer de'vlce 20for delivering the sheets to the printing rolls 21, and with an upperspindle 22, to theends of which are keyed the cam disks 23 supportingthe guide rollers 7 of the rails 7. These cam disks have twoapproximately diametrically opposite bosses, the larger of which isintended, at the moment when the nozzle ends with the sheet end arrivein front of the stop edge 3 to raise the rails 7 together with thecross-bars and to lift the nozzles without shock over the said edge, andthe smaller boss is intended, at the moment when the end of a sheetarrives at the transport device 20 and is seized by the same, to liftthe nozzles off the paper.

The crank disks 17 are at the same time also formed into cam disksintended to control the device for the adjustment of the )aper table 2after removal of each sheet.

here are two cam disks arranged side by side. One of them, 24, whichcontrols a roller 26 at the end of a lever rotatably mounted in theframe, and a disk 27 which controls a roller 29 at the end of a thinnerlever 28 rotatably mounted in the frame.

The paper table 2 is supported in the usual manner by means of nuts 2 onscrews 30 held in vertical position in a frame 32 suspended by means ofarms 31 pivoted to the main frame. These screws are provided at the topwith bevel gears 33 which, by means of a ratchet wheel and pawl 34, areoperated by rods 35 from the lever 25 after removal of each sheet andthus screws are turned and the table moved upward to the necessaryextent.

The lever 28 guided by means of the roller 29 on the surface of the camdisk 27 interrupts the advance or feed as soon as the surface of thepaper stack 1 rises too high and touches a feeler 36 which is' screwedto a beam 37 rotatably mounted on the frame; this balance beam is on theone hand connected by a rod 38 to the lever 28 and therefore is held bythe feeler lever 36 resting on the paper, in such a manner that theroller 29 cannot even follow the recess of the disk 27, and on the otherhand it rests on the arm 39 of a T-sha'ped lever 39, the second arm 39of which is formed into a Weight, and the third arm 39 of which,provided with a hook, prevents the end of thelever 25, connected to thepawl gear 34 and provided with a tooth 40, from sinking, and thereforethe roller 26 from dropping into the recess of the disk 24:.

I claim as my invention:

1. In a printing press, the combination with a support, a member fordetermining the positions of sheets placed on the said support, and aconveyer, of a compressed air tube, a suction tube, nozzles secured inthe said tubes, and means for imparting a reciprocating and rockingmotion to the said tubes and nozzles for successively transferringsheets from the second support to the said conveyer.

2. In a printing press, the combination with a table, a stop member fordetermining the positions of sheets placed upon the table, and aconveyer, of a compressed air tube, a suction tube, nozzles secured tothe said tubes, and means for imparting a reciprocating and rockingmotion to the said tubes and nozzles for successively transferringsheets from the said table over the said stop and to the said conveyer.

3. In a printing press, the combination with a table, a stop member fordetermining the positions of sheets placed upon the table, and aconveyer, of a compressed air tube, a suction tube, nozzles secured tothe said tubes, means for imparting a reciprocating and rocking motionto the said tubes and nozzles for successively transferring sheets fromthe said table over the said stop and to the said conveyer, and meansfor progressively advancing the position of the table as the sheets aretaken therefrom.

4. In a printing press, the combination with a table, a stop member fordetermining the positions of sheets placed upon the table, and aconveyer, of telescoping tubes, one for compressed air and one forvacuum, nozzles secured to the said tubes, and means for imparting areciprocating and rocking motion to the said tubes and nozzles forsuccessively transferring sheets from the said table over the stop tothe conveyer.

In a printing press, the combination with a table, a stop member fordetermining the positions of sheets placed upon the table, and aconveyer, of a compressed air tube, a suction tube surrounding thecompressed air tube and concentric therewith, a straight nozzledepending from the suction tube, a curved nozzle passing through thesuction tube and secured in the compressed air tube, and means forimpartin a reciprocating movement to the said tubes and nozzles torsuccessively transferring sheets from the said table over the stop tothe conveyer.

(5. In a printing press, the combination with a table, a stop member fordetermining the positions of sheets placed upon the table, and aconveyor, of a compressed air tube, a suction tube surrounding thecompressed air tube and concentric therewith, a straight nozzledepending from the suction tube, a curved nozzle passing through thesuction tube and secured in the compressed air tube, a reciprocatingcarriage in which the said tubes are mounted, means for rocking the saidtubes so as to cause the edge of a sheet to be raised by the suctionnozzle and to permit air under pressure to be blown be-- neath the saidsheet, and means for moving the said carriage and tubes and nozzles forconveying the sheets successively from the said table over the said stopand to the said conveyer.

T. In a printing press, the combination with a table, a stop member fordetermining the positions of sheets placed upon the table,

and a conveyer, of a compressed air tube, a

suction tube surrounding the compressed air tube and concentrictherewith, a straight nozzle depending from the suction tube, a curvednozzle passing through the suction tube and secured in the compressedair tube, a reciprocating carriage in which the said tubes are mounted,means for rocking the said tubes so as to cause the edge of a sheet tobe raised by the suction nozzle and to permit air under pressure to beblown beneath the said sheet, means for moving the said carriage andtubes and nozzles for con veying the sheets successively from the saidtable over the said stop and to the said conveyer, and means forautomatically advancing the said table as the sheets are taken therefromto maintain the same distance between the said nozzles and the sheet tobe withdrawn from the table.

In testimony whereof I affix my signature in presence of two Witnesses.

PAUL BIERI. W'itnesses:

W. MIER,

ELMER SCHNEIDER.

